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Analog Devices Inc./Maxim Integrated MAX6385XS38D7-T
- Part No.:
- MAX6385XS38D7-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-82A, SOT-343
- Datasheet:
-
MAX6385XS38D7-T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SC70-4
- Quantity:
- Payment:
- Shipping:
Inventory:2,729
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Product details
Overview
MAX6385XS38D7-T from Maxim Integrated is a push-pull active-high microprocessor supervisory circuit with factory-set 3.80V reset threshold, 1200ms VCC reset timeout, and debounced manual reset input (MR). It monitors +1.8V to +5.0V supply rails, consumes only 3μA at +1.8V, and guarantees valid reset output down to VCC = 1V. Used in portable battery-powered equipment for reliable power-on reset and brownout protection.
For engineers reviewing the MAX6385XS38D7-T datasheet, MAX6385XS38D7-T pinout, MAX6385XS38D7-T application, or MAX6385XS38D7-T equivalent, key selection criteria include its 3.80V ±2.5% threshold accuracy over –40°C to +125°C, 4-pin SC70 package footprint, MR input with internal 63kΩ pullup, and immunity to negative-going VCC transients up to 150µs at 100mV overdrive.
Technical Context
The MAX6385XS38D7-T implements a precision bandgap-based voltage comparator monitoring VCC against a fixed 3.80V threshold, with ±2.5% accuracy across –40°C to +125°C and 60ppm/°C tempco. Its internal timer asserts the active-high RESET output for exactly 1200ms (min) after VCC rises above threshold or after MR release.
It features a dedicated MR input with 1µs minimum pulse width support, 100ns glitch rejection, and guaranteed operation down to VCC = 1V - enabling robust reset control in low-voltage embedded systems where supply sequencing and transient immunity are critical.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 3.80V nominal, ±2.5% over –40°C to +125°C - ensures consistent brownout detection across automotive and industrial temperature ranges. |
| VCC Reset Timeout | 1200ms minimum - provides sufficient hold time for slow-ramping microcontrollers during power-up. |
| Supply Current | 3μA at +1.8V - enables multi-year battery life in always-on IoT sensors and wearables. |
| Output Type | Active-high push-pull - eliminates need for external pullup resistor and supports direct connection to μP RESET pin. |
| Manual Reset Input | MR with 63kΩ internal pullup - allows momentary switch interface without external components; 200ns MR-to-RESET delay ensures fast response. |
| Operating Voltage Range | +1.0V to +5.5V - supports valid reset assertion even during deep brownout conditions down to 1V. |
| Reset Output Validity | Guaranteed down to VCC = 1V - prevents spurious release of reset during undervoltage recovery. |
Pinout & Package
MAX6385XS38D7-T is housed in a RoHS-compliant 4-pin SC70 package (outline 21-0098, land pattern 90-0187), measuring 2.0mm × 2.1mm × 0.95mm. This compact footprint supports high-density PCB layouts in space-constrained portable designs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VCC | Main supply input and monitored voltage rail - must be decoupled with 0.1μF capacitor near pin for transient immunity. |
| 2 | RESET | Active-high push-pull output - drives μP RESET pin directly; sinks 1.2mA at VCC ≥ 2.5V with VOL ≤ 0.3V. |
| 3 | MR | Active-low manual reset input - internal 63kΩ pullup to VCC; logic low forces reset for full timeout period. |
| 4 | GND | Power ground reference - requires low-impedance connection to system ground plane for noise immunity. |
Key Features
| Feature | Design Value |
|---|---|
| Factory-set 3.80V threshold | Eliminates external resistor divider; reduces BOM count and layout area in single-rail systems. |
| 1200ms VCC reset timeout | Meets JEDEC JESD78 reliability requirements for microcontroller initialization timing. |
| Debounced MR input | Rejects mechanical switch bounce and EMI-induced glitches without external RC network. |
| 3μA supply current at 1.8V | Enables integration into ultra-low-power wake-on-event architectures with sub-μA sleep current budgets. |
| –40°C to +125°C operation | Validated for under-hood automotive and industrial control applications without derating. |
Applications
| Portable Medical Sensors | Battery-Powered IoT Nodes |
|---|---|
Use Scenario: Wearable ECG monitor powered by coin-cell battery with intermittent BLE transmission. IC Role / Device Role / Timing Role: Supervises main 3.3V LDO output and asserts active-high RESET to ARM Cortex-M0+ during brownout. Use Value: 3μA quiescent current extends battery life beyond 2 years; 1200ms timeout ensures full MCU boot sequence completes before firmware execution. | Use Scenario: Smart agriculture soil sensor node operating on Li-SOCl₂ primary cell in remote field deployments. IC Role / Device Role / Timing Role: Monitors 3.8V system rail and provides manual reset via tamper-detection switch. Use Value: 3.80V threshold matches LDO dropout voltage; MR input with internal pullup removes discrete resistor, reducing component count and failure points. |
| Industrial PLC I/O Modules | Automotive Body Control Units |
Use Scenario: DIN-rail mounted programmable logic controller with dual 24V/5V supplies and watchdog supervision. IC Role / Device Role / Timing Role: Provides primary VCC reset for 5V microcontroller domain; MR linked to service mode button. Use Value: ±2.5% threshold accuracy over –40°C to +125°C ensures deterministic reset behavior across ambient extremes without calibration. | Use Scenario: Door module controlling window lift, mirror fold, and interior lighting using 3.8V core supply. IC Role / Device Role / Timing Role: Resets Infineon AURIX TC2xx MCU during cold-crank events where battery dips below 6V. Use Value: Negative-going transient immunity (150µs @ 100mV overdrive) prevents false resets during load-dump and jump-start conditions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor reset applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6385XS38D4-T | Same 3.80V threshold and MR functionality, but 1120ms VCC reset timeout (vs. 1200ms). | Suitable where slightly shorter reset hold time is acceptable for faster system boot. | Select when design margin allows 80ms reduction in reset assertion duration. |
| TPS3808G33DBVR | 3.3V threshold (not 3.8V); 200ms timeout; no MR input; SOT-23-5 package. | Requires redesign for different threshold and lacks manual reset capability. | Only consider if system operates at 3.3V rail and MR is unnecessary; not drop-in compatible. |
Compared with MAX6385XS38D4-T, the MAX6385XS38D7-T provides longer reset hold time for slower peripherals; compared with TPS3808G33DBVR, it offers precise 3.8V monitoring, MR support, and SC70 footprint - making it optimal for 3.8V LDO-based systems requiring field-serviceable reset.
Availability
MAX6385XS38D7-T is available at Aetrix Electronics and suitable for portable medical sensors, battery-powered IoT nodes, industrial PLC I/O modules, and automotive body control units requiring stable component supply and long-term production continuity.
Supply support for MAX6385XS38D7-T includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Maxim Integrated (now part of Analog Devices) designs precision analog and mixed-signal ICs for power, sensing, and connectivity applications in industrial, automotive, and computing markets.
The MAX6381–MAX6390 family delivers ultra-low-power, factory-trimmed supervisory circuits optimized for reliable reset generation in space- and energy-constrained embedded systems with demanding thermal and transient immunity requirements.
FAQ
What is the exact reset threshold voltage of the MAX6385XS38D7-T?
The MAX6385XS38D7-T has a factory-set nominal reset threshold of 3.80V, with guaranteed tolerance of ±2.5% over the full operating temperature range of –40°C to +125°C. This value is confirmed in the Reset Thresholds table of the datasheet (suffix "38" corresponds to 3.71V min / 3.80V nom / 3.90V max), and applies specifically to the MAX6385XS38D7-T variant.
Does the MAX6385XS38D7-T support manual reset, and how is it implemented?
Yes, the MAX6385XS38D7-T includes a debounced manual reset input (MR) on Pin 3. It is active-low, features an internal 63kΩ pullup resistor to VCC, and requires a minimum 1µs low pulse to assert reset. The device holds RESET active for the full 1200ms timeout after MR is released, eliminating need for external debounce circuitry.
What package type and dimensions does the MAX6385XS38D7-T use?
The MAX6385XS38D7-T uses a 4-pin SC70 package (outline number 21-0098, land pattern 90-0187), measuring 2.0mm × 2.1mm × 0.95mm. It is RoHS-compliant ("+T" suffix), rated for –40°C to +125°C operation, and designed for reflow soldering at +260°C peak temperature.
How does the MAX6385XS38D7-T behave during VCC brownout conditions?
When VCC falls below 3.80V, the MAX6385XS38D7-T asserts its active-high RESET output within 35µs. RESET remains asserted for a minimum of 1200ms after VCC rises above the threshold. The device guarantees correct RESET logic state down to VCC = 1V, ensuring deterministic behavior during deep undervoltage recovery.
Is the MAX6385XS38D7-T pin-compatible with older Maxim reset ICs like MAX809?
Yes, the MAX6385XS38D7-T is explicitly listed as pin-compatible with MAX809/MAX810/MAX803 and other legacy supervisors in the Features section of the datasheet. However, note that MAX6385XS38D7-T uses a 4-pin SC70 package while MAX809 uses 3-pin SOT-23 - so board layout adaptation is required despite functional and signal-pin equivalence.
MAX6385XS38D7-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SC-82A, SOT-343
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 3.8V
- Output:
- Push-Pull, Totem Pole
- Reset:
- Active High
- Reset Timeout:
- 1.2s Minimum
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-70-4
MAX6385XS38D7-T FAQ
1.How can I place an order for MAX6385XS38D7-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6385XS38D7-T on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for MAX6385XS38D7-T reliable?
The price and inventory of MAX6385XS38D7-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6385XS38D7-T is usually 5 days.
3.What payment methods are accepted for MAX6385XS38D7-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6385XS38D7-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6385XS38D7-T?
MAX6385XS38D7-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6385XS38D7-T order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for MAX6385XS38D7-T?
For technical support, including MAX6385XS38D7-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6385XS38D7-T requirements.
6.How does Aetrix verify that MAX6385XS38D7-T is sourced from the original manufacturer or authorized distributors?
All MAX6385XS38D7-T products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that MAX6385XS38D7-T meets industry standards.
7.What is the process for return or replacement of MAX6385XS38D7-T?
All MAX6385XS38D7-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6385XS38D7-T, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The MAX6385XS38D7-T part is unused and in its original packaging.
Return procedure for MAX6385XS38D7-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX6385XS38D7-T Tags
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MIC826SYMT-TR
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